"Edit> Changes> Accept/Reject" automatically checks "Edit> Changes> Show".
This is needed to see deletions for example. Problem is that in this mode user can't see the format updates.
If user A applies green font and underlining color to a text, user B will see the change in the "user color" (may be blue, yellow or anything else...).
So user B has to accept/reject the change without seeing the effect.
We should perhaps think about improving this feature, perhaps by adding the ability to switch "show" mode from this dialog ?
I definitely agree on this one. I'm going to mark as NEW to move this out of UNCONFIRMED.